Loss study of permanent magnet synchronous motor in voltage deviation by frequency converter power supply

In order to explore the influence of voltage deviation on the loss of permanent magnet synchronous motor (PMSM), a 50kW PMSM was taking as an example. The finite element method was taken for the numerical calculation and analysis of its rated load in voltage deviation situation by frequency converter power supply. The magnetic flux density of stator core, rotor core and air gap were analyzed. The fundamental and harmonic component of winding current were analyzed as well. The distribution characteristic of stator corn loss, rotor corn loss, winding loss and permanent magnet eddy loss were obtained. Phase A current was selected to simulate and compared with experimental result. As indicated by the result: With the increase of voltage, stator core loss, rotor core loss, permanent magnet eddy loss and winding loss all raised. The numerical calculation result was matched to the experimental data, which verified the correctness of research method. It can provide some reference for the motor design and optimization.